UP-LINK frequency ia higher than the DOWN-LINK frequency; the shift direction’ls positive, and i iris lower the shift direction is negative. Tha offset is variable between 0:10 99 S85MHZ on this unit Press the DUNG key Whigs the craven displays icon, press MHz Key. Screen shows the currant talus of offset direction and offset frequency. The default value is BEAR 3.80 MHz (B00KHzZ) in the negative direction. Press MHz LILO key until the desired offset direction is set.